Golden Age Audio Project PRE-73 MKIV, 1-Channel microphone, line and instrument preamplifier, Vintage style, No integrated circuits in the signal path, Max gain: 80 dB, Switchable gain range: 20 - 80 dB, Switchable between MIC/LINE mode (30 dB reduced gain), AIR EQ with +3 dB or +6 dB boost at 30 kHz, Two switchable 6 dB / octave high-pass filters at 40 Hz (HP1) or 170 Hz (HP2), Tantalum capacitors in the signal path, Switchable impedance: 1200 Ohm or 300 Ohm (MIC mode), Output PAD circuit, +48 V phantom power, Phase switch, 4-Step LED meter and power LED, Format: 9.5